Grew up in the country (for a few years... ) and there was a friend of mine that would slink around... always quiet and tried to avoid trouble whenever he could. He was practically terrified of getting into a fight. He had seen how bloody some of these fights could get and decided he wanted no part of it. Now his fear turned to the ridiculous... he'd let himself be bullied by anyone... no matter how big or small. Finally my other friends got tired of listening to his whining. So when he said he was terrified of getting punched... one friend turned real quick and punched him right in the nose. Naturally after the poor guy had gotten over the initial shock and all the cursing... the guy that punched him said, "Was it really that bad?" Slowly the guy thought about it and said, "No... not really." After that, he refused to be bullied anymore... and though he still would rather keep the peace, he wasn't afraid to fight if he had to.
I think you are afraid of getting hit (being rejected)... but when it finally happens to you, I think you will realize that it's not nearly so bad as you're making it out to be.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen